Another in the long sequence of milestones for Crossrail was achieved today as one of its Tunnel Boring Machines broke through the side wall and entered the huge cavern dug underneath Stepney.
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The huge cavern some 40 metres underground is where the Crossrail lines will split, heading either northwards, or towards the South-East of London. The Stepney Green caverns are some of the largest mined caverns ever built in Europe using a tunnelling technique called Sprayed Concrete Lining.
I was able to see the cavern when it was under early construction just over a year ago.
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The TBM will now undergo maintenance inside Stepney Green’s westbound cavern before resuming tunnelling towards Whitechapel, Liverpool Street and Farringdon.
The breakthrough is the first of four that will take place at Stepney Green. Another TBM, also coming from Limmo is due to breakthrough into the site in the next few weeks.
Photos supplied by Crossrail.
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